You don't need to be a professional racer to share a seat with Sir Stirling Moss, but you will need to be rather wealthy. RM Auctions will auction off this pristine Maserati 450S prototype driven by Moss in the 1956 Mille Miglia. It's expected to fetch between $5.5 and $7.5 million, so don't bother showing up without that American Express Centurion Card.
The 1956 Mille Miglia didn't go too well for Moss and navigator Denis Jenkinson. A brake failure in what was then called the 350S nearly sent them into a ravine just outside Rome, but both Moss and Jenkinson walked away unharmed—leaving the Maserati teetering precariously on a tree.
Following the accident, the car was shipped back to the Maserati factory for repair and further development. In its original form, as chassis number 3501, the 350S was powered by a six-cylinder. Following the accident, the chassis was stretched a few inches to accommodate a new 520-hp 5.6-liter V8. The chassis number was changed to 4501 and its name to 450S to reflect its new displacement.
Following the modifications, the poor Maserati was crashed again during practice for the 1957 Mille Miglia, but other examples of the 450S won at the Swedish Gran Prix and the 12 Hours of Sebring.
Following its retirement from racing, the 350S changed ownership three times and was even briefly powered by a Corvette engine in 1965. In 1986, it underwent a full restoration to return it to 4501 specification. An original period Maserati 5.7-liter V8, thought to produce about 572 hp, was sourced from a Formula racing hydroplane, of all places, and still powers the car today.
The 350S goes under the hammer at the RM Auctions event in .